Move notifications package to distribution

Since the notifications package is now decoupled from storage, we are moving it
to the root package.

Signed-off-by: Stephen J Day <stephen.day@docker.com>

notifications/event_test.go

@@ -0,0 +1,145 @@
+package notifications
+
+import (
+	"encoding/json"
+	"strings"
+	"testing"
+	"time"
+)
+
+// TestEventJSONFormat provides silly test to detect if the event format or
+// envelope has changed. If this code fails, the revision of the protocol may
+// need to be incremented.
+func TestEventEnvelopeJSONFormat(t *testing.T) {
+	var expected = strings.TrimSpace(`
+{
+   "events": [
+      {
+         "id": "asdf-asdf-asdf-asdf-0",
+         "timestamp": "2006-01-02T15:04:05Z",
+         "action": "push",
+         "target": {
+            "type": "manifest",
+            "name": "library/test",
+            "digest": "sha256:0123456789abcdef0",
+            "tag": "latest",
+            "url": "http://example.com/v2/library/test/manifests/latest"
+         },
+         "request": {
+            "id": "asdfasdf",
+            "addr": "client.local",
+            "host": "registrycluster.local",
+            "method": "PUT",
+            "useragent": "test/0.1"
+         },
+         "actor": {
+            "name": "test-actor"
+         },
+         "source": {
+            "addr": "hostname.local:port"
+         }
+      },
+      {
+         "id": "asdf-asdf-asdf-asdf-1",
+         "timestamp": "2006-01-02T15:04:05Z",
+         "action": "push",
+         "target": {
+            "type": "blob",
+            "name": "library/test",
+            "digest": "tarsum.v2+sha256:0123456789abcdef1",
+            "url": "http://example.com/v2/library/test/manifests/latest"
+         },
+         "request": {
+            "id": "asdfasdf",
+            "addr": "client.local",
+            "host": "registrycluster.local",
+            "method": "PUT",
+            "useragent": "test/0.1"
+         },
+         "actor": {
+            "name": "test-actor"
+         },
+         "source": {
+            "addr": "hostname.local:port"
+         }
+      },
+      {
+         "id": "asdf-asdf-asdf-asdf-2",
+         "timestamp": "2006-01-02T15:04:05Z",
+         "action": "push",
+         "target": {
+            "type": "blob",
+            "name": "library/test",
+            "digest": "tarsum.v2+sha256:0123456789abcdef2",
+            "url": "http://example.com/v2/library/test/manifests/latest"
+         },
+         "request": {
+            "id": "asdfasdf",
+            "addr": "client.local",
+            "host": "registrycluster.local",
+            "method": "PUT",
+            "useragent": "test/0.1"
+         },
+         "actor": {
+            "name": "test-actor"
+         },
+         "source": {
+            "addr": "hostname.local:port"
+         }
+      }
+   ]
+}
+	`)
+
+	tm, err := time.Parse(time.RFC3339, time.RFC3339[:len(time.RFC3339)-5])
+	if err != nil {
+		t.Fatalf("error creating time: %v", err)
+	}
+
+	var prototype Event
+	prototype.Action = "push"
+	prototype.Timestamp = tm
+	prototype.Actor.Name = "test-actor"
+	prototype.Request.ID = "asdfasdf"
+	prototype.Request.Addr = "client.local"
+	prototype.Request.Host = "registrycluster.local"
+	prototype.Request.Method = "PUT"
+	prototype.Request.UserAgent = "test/0.1"
+	prototype.Source.Addr = "hostname.local:port"
+
+	var manifestPush Event
+	manifestPush = prototype
+	manifestPush.ID = "asdf-asdf-asdf-asdf-0"
+	manifestPush.Target.Digest = "sha256:0123456789abcdef0"
+	manifestPush.Target.Type = EventTargetTypeManifest
+	manifestPush.Target.Name = "library/test"
+	manifestPush.Target.Tag = "latest"
+	manifestPush.Target.URL = "http://example.com/v2/library/test/manifests/latest"
+
+	var layerPush0 Event
+	layerPush0 = prototype
+	layerPush0.ID = "asdf-asdf-asdf-asdf-1"
+	layerPush0.Target.Digest = "tarsum.v2+sha256:0123456789abcdef1"
+	layerPush0.Target.Type = EventTargetTypeBlob
+	layerPush0.Target.Name = "library/test"
+	layerPush0.Target.URL = "http://example.com/v2/library/test/manifests/latest"
+
+	var layerPush1 Event
+	layerPush1 = prototype
+	layerPush1.ID = "asdf-asdf-asdf-asdf-2"
+	layerPush1.Target.Digest = "tarsum.v2+sha256:0123456789abcdef2"
+	layerPush1.Target.Type = EventTargetTypeBlob
+	layerPush1.Target.Name = "library/test"
+	layerPush1.Target.URL = "http://example.com/v2/library/test/manifests/latest"
+
+	var envelope Envelope
+	envelope.Events = append(envelope.Events, manifestPush, layerPush0, layerPush1)
+
+	p, err := json.MarshalIndent(envelope, "", "   ")
+	if err != nil {
+		t.Fatalf("unexpected error marshaling envelope: %v", err)
+	}
+	if string(p) != expected {
+		t.Fatalf("format has changed\n%s\n != \n%s", string(p), expected)
+	}
+}